The frequencies of PD‐1+, PD‐L2+, CTLA‐4+, ICOS+, 4‐1BBL+, OX40+ and Tim‐3+ cells in granulocytes were significantly increased in MM patients, although most of them were < 10% (Figure 4a and b). The gene discussed is PDCD1; the disease is Miyoshi myopathy.